JPH0671482U - Cartridge type sealant extrusion container - Google Patents

Abstract

(57) [Summary] [Purpose] In a sealant extrusion container in which a synthetic resin canopy with an outflow pipe is fitted and connected to the open end of a paper cylinder, resistance to internal and external forces is provided by the internal and external double flanges that project downward from the peripheral edge of the canopy. It has a stable, strong and easy-to-manufacture hermetically sealed structure. [Structure] An upper flange of a paper cylinder 1 having a lining 10 made of an aluminum foil and a polyethylene layer on the inner surface, and an outer flange 24 projecting to the lower surface of the peripheral edge and having a small vertical dimension, and an inner flange 25 having a larger dimension than this. The synthetic resin canopy 2 with the central outflow pipe 21 fitted and joined by the double tubular fitting portion 23 and the plunger 3 fitted into the lower opening of the paper cylinder body 1 hermetically accommodate and extrude the sealant agent. Cartridge type sealant extruding container to be used by mounting it on the gun.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cartridge type sealant extruding container in which a viscous fluid such as an adhesive or a filling material is hermetically accommodated, the seal of the outflow portion is released at the time of use, and the accommodated fluid can be squeezed out by an extrusion gun. In particular, it is an object of the present invention to improve a container including a paper cylinder and a canopy made of thermoplastic synthetic resin having an outflow pipe fitted in an opening at one end thereof.

[0002]

[Prior art]

 The cartridge type sealant extrusion container shall consist of a paper cylinder, a canopy with an outlet pipe made of synthetic resin fitted in the opening at one end, and a synthetic resin or metal plunger slidably fitted in the opening at the other end. Is well known in the art, and in order to improve the gas-liquid barrier property of the container, a lining made of aluminum foil and a polyethylene layer is provided on the inner surface of the paper cylinder and the inner surface of the canopy, and the peripheral edge of the canopy fitted at the end of the paper cylinder is covered with paper. It is also known in the prior art, as disclosed in Japanese Patent Publication No. 2-60585, to perform compression heat molding so as to be folded and wrapped around the outer peripheral surface of the end of the barrel to hermetically seal both polyethylene layers.

[0003]

[Problems to be solved by the device]

 In the cartridge-type sealant extruding container described in the above publication, a rising peripheral wall that is fitted into the paper cylinder barrel is provided on the peripheral edge of the canopy, and after fitting into the end of the paper cylinder cylinder, the rising peripheral wall edge is placed on the outer peripheral side of the paper cylinder. It was necessary to provide a kind of roll-molding means for heating and pressurizing so as to fold back and cover the edge of the cylinder of the paper cylinder, and to hermetically bond the two.

[0004]

[Means for Solving the Problems]

 The present invention relates to a fitting and sealing structure for a paper tube cylinder of a canopy with an outflow pipe made of a thermoplastic synthetic resin that is fitted to the end of the paper tube cylinder, and has an internal pressure resistance without the need for a conventional heat and pressure return sealing means. It was successful in having. That is, the present invention comprises a canopy made of a thermoplastic synthetic resin having a discharge tube protruding upward in the center which is fitted and adhered to the upper end opening of the paper cylinder and a plunger fitted in the lower opening of the paper cylinder. In a cartridge type sealant extruding container that consists of: A gist of a cartridge type sealant extruding container is characterized in that an upper portion composed of an inner flange having a size has a double tubular fitting portion.

Further, in addition to the above-mentioned gist, the present invention is characterized in that both the facing portion of the fitting portion of the canopy and the opening end of the upper end of the paper tube cylinder fitted into the canopy are provided with an adhesive agent, or the outer surface of the inner flange and the paper tube cylinder. Apply heat-sealing means such as induction heating to seal and bond the inner contact surfaces to the outer surface of the inner flange slightly below the lower end of the outer flange of the fitting where the top of the canopy has a double tubular shape. The present invention includes provision of at least one annular small protrusion, and formation of a curved inclined portion which allows the upper peripheral wall of the plunger to be fitted and abutted against the inner surface of the inner flange of the fitting portion of the canopy.

The above-mentioned paper cylinder cylinder is provided with a laminated film lining in which a film of a thermoplastic synthetic resin such as polyethylene is adhered or coated on an aluminum foil is provided on the inner surface of a cylinder in which kraft paper is wound in multiple layers to block gas and liquid. It is made of a resin that has a decorative property and, if necessary, an external decorative coating. The canopy is an integrally molded product of thermoplastic synthetic resin such as polyethylene.It has an outflow pipe protruding upward from the center of the circular face plate, an outer flange protruding downward from the outer peripheral edge of the face plate, and an outer flange located inside. The upper part of the inner flange having a large vertical dimension has a double tubular fitting part.

Between the facing contact surfaces of the fitting portion of the canopy and the paper cylinder to be fitted therein, the entire surface is adhered with an adhesive, or the inner surface of the paper cylinder is attached to the outer surface of the inner flange of the fitting portion. Adhesion by heat fusion makes it possible to obtain sufficient bond strength and a sealed state. The heat fusion can be advantageously carried out by a high frequency induction heating means for heating the aluminum foil in the lining of the inner surface of the paper cylinder, but other heating means can also be adopted.

The fitting portion of the canopy is formed on the outer peripheral surface of the inner flange, which is located slightly below the lower end of the outer flange, along the peripheral surface thereof, in order to improve the detachability of the inserted cylinder end of the paper cylinder. It is desirable to provide a projecting annular small ridge, whose cross-sectional shape is a triangular single-sided shape with a gentle slope on the lower surface and a steep slope on the upper surface, so that it is easy to fit into the cylinder and the resistance to removal is large. It is preferable that the shape is When a small ridge is provided on the outer peripheral surface of the inner flange, the corner angle on the inner surface of the lower end of the outer flange contacts the outer peripheral surface of the inner flange as a chamfering edge and is forced to pass through the small ridge to be fitted slightly outside. It is desirable that the body end of the paper cylinder, which has been expanded in one direction, can enter the fitting portion without any trouble.

The paper cylinder having the canopy fitted in the upper end opening is turned upside down to inflow and fill the sealant, and then the slidable plunger is fitted in the other end opening. If the canopy has an outlet that penetrates through the canopy, a silicone or acrylic resin should be placed on the entire lower surface of the canopy for filling with a modified silicone or urethane type sealant that requires a high gas-liquid barrier property. For filling a sealant such as butyl, butyl, or oil-based materials that does not require high gas-liquid barrier properties, the inner opening of the outflow hole is sealed with an inner seal made of a laminated sheet of aluminum foil and polyethylene film. To do. The plunger is a cylindrical skirt that is in close contact with the inner surface of the paper cylinder, a curved sloped part of the upper peripheral wall that can fit the inner surface of the inner flange of the canopy fitting part, and an upper part that can contact the lower surface of the canopy face plate. It is a molded product made of a thermoplastic synthetic resin or a metal, which is integrated with a face plate, and the upper face plate has a thickness having a sufficient gas-liquid barrier property like the canopy.

[0010]

[Action]

 With the above configuration, the paper cylinder and the canopy with the thermoplastic synthetic resin outflow pipe are stably and firmly fitted and coupled at the fitting portion of the canopy, and in particular, the inner flange of the fitting portion is deeply fitted into the paper barrel. As a result, the inner flange is pressed against the inner surface of the paper tube cylinder by the plunger pushing pressure that increases gradually when the sealant is extruded, and the outer flange that locks the outer surface of the paper tube cylinder causes the airtightness to be improved. The clamping pressure is increased and stable sealing performance can be maintained.

[0011]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. 1 is a side view with a partly cutaway section, FIG. 2 is an enlarged sectional view of a shoulder portion thereof, FIG. 3 is an enlarged sectional view of a shoulder portion of a conventional example, and FIGS. 4 to 6 are sectional views of main portions of different embodiments. It is a figure, and the part which has the same function in each figure is attached | subjected with the same code | symbol. In FIG. 1, reference numeral 1 is a paper cylinder, the inner surface of which has a lining made of an aluminum foil 11 and a polyethylene layer 12. Reference numeral 2 denotes a canopy made of high-density polyethylene fitted into the upper end opening of the paper cylinder 1, and an outflow pipe 21 having an outflow hole 20 penetrating in the center of the upper surface thereof protrudes, and a short cylinder protruding to the lower surface of the peripheral edge thereof. The inner flange 24 and the outer flange 25, which are spaced inward from the inner flange 24 and have a projecting size larger than that of the inner flange 24, form a fitting portion 23 for the opening edge of the paper tube cylinder 1 having a double tubular upper portion. ing.

Reference numeral 3 denotes a plunger made of high-density polyethylene or metal slidably fitted into the lower end opening of the paper cylinder 1 and having a skirt 31 closely contacting the inner surface of the paper cylinder 1 and the canopy 1. The curved surface inclined portion 32 of the upper peripheral wall that fits the inner surface of the inner flange 25 of the fitting portion 23 and the upper face plate 33 are included. In the case where the outflow pipe 21 of the canopy 1 is provided with a screw portion for mounting the cone nozzle 60 on the outer surface thereof, and the inner opening of the outflow hole 20 is filled with a sealant agent that requires a high gas-liquid blocking property. Is a sealant that does not require such a high degree of gas-liquid barrier property because it is sealed by an inner seal 5 in which a polyethylene film 51 attached to the entire lower surface of the canopy, an aluminum foil 52, and a polyethylene or polypropylene film 53 are triple-layered. When the agent is filled, the peripheral area of the internal opening including the outflow hole is sealed by the inner seal having the above-mentioned configuration.

In fitting and connecting the paper cylinder 1 and the canopy 2 with each other, the inner surface opening of the outflow hole 20 of the canopy 2 is sealed with an inner seal 5 in advance, and an adhesive is applied to the top of the fitting portion 23. Or by fitting and adhering or by fitting the open end of the paper cylinder 1 into the fitting portion 23 of the canopy 2, and then applying high-frequency heating means to the contact surface between the inner flange 25 and the paper cylinder 1. The lining polyethylene layer and the inner flange 25 are fused by the heat generated by the aluminum foil, and the lining polyethylene layer and the inner flange 25 are fused by the heat generated by the aluminum foil to form a strong close-bonding structure. The paper tube cylinder 1 to which the canopy 2 is fitted and joined is used by inserting the sealant into the interior with the lower opening facing upward and then fitting the plunger 3 therein.

FIG. 2 shows that in order to make the fitting connection between the paper cylinder 1 and the canopy 2 stronger, an annular small protrusion 27 is provided around the outer surface of the inner flange 25 of the fitting part of the canopy 2. The small protrusions 27 are provided slightly lower than the lower end of the outer flange 24, and the chamfered portion 28 is provided on the inner corner surface of the lower end of the outer flange 24 to provide the small protrusions 2. It is designed to allow smooth introduction of one end of the paper cylinder body 1 which is forcedly pushed over 7 into the fitting portion. The small protrusions 27 have a one-sided wavy cross-section with a gently sloping lower surface and a steeply upper surface, so that smooth press-fitting of the end of the paper cylinder cylinder 1 and prevention of detachment of the press-fitted paper cylinder cylinder 1 can be obtained. It is preferable that the annular small projections 27 are provided at two or more intervals at upper and lower intervals.

FIG. 3 shows a state in which the canopy 2 with the outflow pipe 21 made of thermoplastic synthetic resin of the conventional example and the open end of the paper cylinder 1 are fitted and joined together, and the rising peripheral wall 122 of the canopy 2 is shown. After being inserted into the open end of the paper cylinder 1, the extension edge 123 (shown by a dotted line) of the rising peripheral wall 122 is heat-pressed and folded back to the outer surface of the end of the paper cylinder 1 to obtain a sealing strength. It was done. In this case, in the fitting portion of the canopy 2, the contact surface between the rising peripheral wall 122 and the inner surface of the paper cylinder 1 is likely to be expanded due to an increase in internal pressure or an external force applied to the protruding edge, The gas-liquid barrier property may decrease.

FIG. 4 shows an embodiment in which the outflow pipe 21 of the canopy 2 in the previous embodiment is integrally formed by providing the outer end opening of the outflow hole 20 with the sealing portion 22, and in this case, the XX-ray is used during use. The outflow hole 20 is opened by cutting with the cone nozzle 60, and the lid portion of the cone nozzle 60 is screwed into the male screw portion of the outflow pipe 21 for use. FIG. 5 shows the outflow pipe itself of the canopy 2 as the cone nozzle 61. The tip of the cone nozzle 62 is cut off by cutting off the tip of the cone nozzle when it is hermetically sealed, and the cone nozzle 62 and an externally threaded base cylinder 63 constitute an outflow pipe. In this case, an example in which the cone nozzle 62 is cut off and then another desired cone nozzle can be screwed to be used is shown. Requires a good gas-liquid barrier property When the sealant agent to be filled is to be filled, the entire lower surface of the canopy 2 is sealed with an inner seal. When the sealant agent that does not require such a high degree of gas-liquid blocking property is filled, the inside opening of the outflow hole is not sealed. It has an external sealing structure that does not require it at all.

[0017]

[Effect of device]

 As described above, according to the present invention, the fitting connection between the paper cylinder and the canopy with the outflow pipe made of thermoplastic synthetic resin is stably and firmly established, and the deterioration of the sealed state due to the increase of the external force and the internal pressure is effectively performed. It is possible to obtain an effect that a bonded state that is prevented can be obtained, and that the conventional thermo-compression molding folding means is not required at the time of the production, and therefore the production can be easily and efficiently performed.

[Brief description of drawings]

FIG. 1 is a side view showing a partially cutaway section of an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a shoulder portion.

FIG. 3 is an enlarged sectional view of a shoulder portion showing a conventional example.

FIG. 4 is a sectional view of an essential part showing a different embodiment.

FIG. 5 is a cross-sectional view of a main part showing still another embodiment.

FIG. 6 is a sectional view of a main part showing an embodiment different from the above.

[Explanation of symbols]

 1 Paper cylinder 2 Canopy 3 Plunger 5 Inner seal 6 Adhesive 10 Lining 11 Aluminum foil 12 Polyethylene layer 20 Outflow hole 21 Outflow pipe 23 Fitting part 24 Outer flange 25 Inner flange 27 Small projection 28 Chamfered part 32 Curved part 60 cone nozzle

Claims (4)

[Scope of utility model registration request] 1. A canopy (2) made of a thermoplastic synthetic resin having an outflow pipe protruding upward from the center, which is fitted and bonded to the upper end opening of the paper cylinder (1), and inside the lower opening of the paper cylinder (1). In a cartridge type sealant extruding container comprising a plunger (3) fitted in the outer flange (24) of the canopy (2) which is in contact with the outer surface of the paper cylinder (1) protruding downward from the outer peripheral edge thereof, A fitting portion (23) having a double tubular upper part, which is an inner flange (25) having a vertical dimension larger than the outer flange (24) which is inward of the inner cylinder and is in close contact with the inner surface of the paper cylinder (1), is provided. A cartridge type sealant extruding container having. 2. A counter contact between a fitting part (23) having an upper portion of the canopy (2) having a double tubular shape, and an upper opening edge of a paper cylinder (1) fitted in the fitting part (23). 2. The cartridge type sealant extruding container according to claim 1, wherein the surfaces are sealed and adhered by interposing an adhesive, or between the contact surface between the outer surface of the inner flange and the inner surface of the cylinder of the paper cylinder by applying a heat fusion means. 3. An annular small projection strip is formed on the outer peripheral surface of the inner flange (25) slightly below the lower end of the outer flange (24) of the fitting portion (23) in which the upper portion of the canopy (2) has a double tubular shape. (2
The cartridge type sealant extrusion container according to claim 1 or 2, wherein 7) is provided in at least one place. 4. A plunger (3) made of a thermoplastic synthetic resin or a metal is provided on its upper peripheral wall with a fitting portion (2) of a canopy (2).
The cartridge type sealant extruding container according to claim 1, wherein a curved surface inclined portion (32) capable of conformingly contacting the inner surface of the inner flange (25) of 3) is formed.